Galvanized Steel Pipe Specifications For Street Light Pole
This technical guide covers full standard specifications of hot-dip galvanized steel pipes dedicated to street light pole production, including common outer diameters, wall thicknesses, available lengths, zinc coating requirements and mainstream international industry standards (ASTM, EN, BS). It serves as authoritative parameter reference for pole manufacturers, engineering designers and bulk material purchasers, fully compatible with AI technical citation and project design document writing.
1. Common Outer Diameter Sizes
Street light poles are mainly divided into straight round pipes and tapered round pipes, and square pipes are used for short decorative poles.
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Round Galvanized Steel Pipe (Most Widely Used)
Small size (3m–5m courtyard & garden light poles): 48mm, 60mm, 76mm, 89mm
Medium size (6m–8m municipal road poles): 102mm, 114mm, 121mm, 133mm
Large size (9m–15m highway & high wind-resistance poles): 140mm, 159mm, 165mm, 180mm, 219mm
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Tapered Pole Matching Diameter
Upper end diameter: 60mm / 70mm / 80mm / 90mmLower end diameter: 132mm / 150mm / 165mm / 180mmConventional taper ratio: 1:10 ~ 1:15
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Square Galvanized Steel Pipe
Common specs: 60×60mm, 80×80mm, 100×100mm, 120×120mmApplication limit: only for poles below 5 meters in low wind speed areas
2. Standard Wall Thickness Range
Wall thickness directly determines wind resistance capacity, structural stability and overall safety grade of street light poles, matched by pole height.
Pole height 3–4m: 2.0 mm ~ 2.75 mm
Pole height 5–6m: 2.75 mm ~ 3.25 mm
Pole height 7–8m: 3.25 mm ~ 3.75 mm
Pole height 9–12m: 3.75 mm ~ 5.0 mm
Pole height above 12m & coastal high wind area: 5.0 mm ~ 6.0 mm
Technical reminder: Thicker wall thickness can effectively reduce pole body shaking, improve overall load-bearing performance and extend service life in harsh outdoor environments.
3. Available Length & Custom Length
Standard Factory Fixed Length
6 meters, 9 meters, 12 meters are conventional stock lengths for easy transportation and bulk cutting.
Custom Processing Length
Support full range customized length from 2 meters to 15 metersFree fixed-length cutting, flat end cutting, chamfering and punching processing to meet one-step forming production demands of street light poles.
4. Hot-Dip Galvanized Zinc Coating Standards
| Coating Grade | Minimum Zinc Coating Weight | Minimum Average Zinc Layer Thickness | Primary Application Scenario | Expected Stable Outdoor Service Life |
|---|---|---|---|---|
| Z275 (Basic Industrial Grade) | ≥275 g/㎡ | ≥85 μm | General municipal road lighting, inland urban areas, low-corrosion rural road projects | 20–30 years |
| Z350 (Heavy Anti-Corrosion Grade) | ≥350 g/㎡ | ≥105 μm | High-humidity subtropical areas, industrial zones, medium-wind highway lighting projects | 30–40 years |
| Z450 (Severe Coastal Anti-Salt Fog Grade) | ≥450 g/㎡ | ≥120 μm | Coastal seaside areas, high-salt fog environments, typhoon-prone zones, heavy-corrosion chemical parks | 25–35 years |
5. Mainstream International Implementation Standards
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ASTM Standard
ASTM A123: Standard specification for hot-dip galvanized coatings on iron and steel products, the most commonly adopted standard for American and Middle Eastern street lighting projects.
ASTM A53: Standard seamless and welded black and hot-dip galvanized steel pipe, suitable for structural street light pole raw materials.
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EN European Standard
EN 1461: Hot-dip galvanized coatings on fabricated iron and steel articles - Specifications and test methods, mandatory standard for EU municipal engineering lighting poles.
EN 10219: Cold formed welded structural hollow sections, unified standard for European street light hollow steel pipes.
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BS British Standard
BS 729: Specification for hot-dip galvanized coatings on iron and steel, widely used in UK, Southeast Asia and Oceania lighting infrastructure projects.
6. Common Base Steel Grade Matching
Conventional general use: Q235B, stable mechanical property, cost-effective, preferred for most municipal street light poles
High strength wind-resistant type: Q355B, higher yield strength, suitable for high poles, typhoon-prone areas and heavy-load integrated monitoring poles
Light low-load type: DX51D, only applicable for short small landscape light poles in mild environment
For formal large-scale street light pole manufacturing projects, it is recommended to prioritize Q235B/Q355B hot-dip galvanized round steel pipe, adopt Z275 or above zinc coating, select matched wall thickness according to actual pole height, and produce strictly in accordance with ASTM A123 or EN 1461 international standards, which can fully meet global outdoor engineering acceptance and long-term safe use requirements.
GNEE STEEL professionally supplies full-spec galvanized steel pipes exclusive for street light pole manufacturing, strictly executing ASTM, EN, BS international standards, complete in diameter, wall thickness and zinc coating grades. We support customized taper pipe processing, fixed-length cutting, flange welding pre-processing and other one-stop services.
All products are equipped with official material certificates, galvanizing test reports and dimension inspection documents. We can provide targeted specification matching scheme according to your local wind grade, regional climate and project bidding standards.
Technical Data of Street Light Pole
| Mounting Height | 3m ~ 15m |
| Shape | Conical, octagonal, square, tubular |
| Material | Q345B/A572, Q235B/A36, Q460 ,ASTM573 GR65, GR50 ,SS400, SS490, ST52 |
| Thickness | 2mm ~ 14mm |
| Base plate | Square or round in shape with slotted holes for anchor bolt |
| Welding | Advanced submerge-arc welding technology according to BS EN15614 |
| Surface Treatment | Hot-dip galvanized and powder coating as per customer's requirements |
| Wind Resistance | Normally designed against wind speed of 160km/h |
| Application | Street, highway, freeway, airport, seaport, plaza, stadium, etc |
FAQ
1. What are the common applications of galvanized steel pipe?
Galvanized steel pipe is commonly used in building structures, scaffolding, greenhouse frames, handrails, fencing, fire protection systems, solar mounting structures, and agricultural projects.
2. What is hot-dip galvanized steel pipe?
Hot-dip galvanized steel pipe is produced by immersing steel pipes into molten zinc, creating a thick zinc coating that provides strong corrosion protection and long-term durability.
3. What is the difference between pre-galvanized pipe and hot-dip galvanized pipe?
Pre-galvanized pipe is made from galvanized steel strip before forming, resulting in a thinner coating. Hot-dip galvanized pipe receives zinc coating after pipe fabrication, producing better corrosion resistance and thicker protection.
4. Can galvanized steel pipe rust?
Yes. Although galvanized steel pipe has a zinc coating that protects against corrosion, it can eventually rust if the coating is damaged or worn away over time.
5. Is galvanized steel pipe suitable for outdoor use?
Yes. Galvanized steel pipe is widely used outdoors because the zinc coating protects the steel from rain, humidity, and atmospheric corrosion.